Added text to state that synthetic fragrances frequently contain irritants, such as solvents and propellants, that can trigger sensitivities in some people (cited Silva-Néto et al. as reference 2, Vethanayagam et al. as reference 3, and Celeiro et al. as reference 4).

Revised text to state that mixtures, such as those containing the volatile oils of lemongrass, eucalyptus, melaleuca, clove, thyme with butylated hydroxytoluene, triclosan, and undenatured ethanol, are being investigated against methicillin-resistant Staphylococcus aureus in vitro.